From the OP's link:
GALAXY Gear is certified IP55*, protected against penetration of dust and water splashes from daily use.
* IP55 rating means that device is protected against penetration of dust in quantity to interfere satisfactory operation and harmful ingress of water under test condition of spraying the enclosure from any direction with a stream of water from a standard 6.3mm diameter test nozzle for up to 3 minutes. According to accredited test results by Korea Labouratory Accreditation Scheme, individual results may vary.
This is pretty specific and precise it seems to me. Not sure what the OP is unclear about.
From the IP55 rating, no, it is not suitable for full immersion for any length of time, nor is it protected at any depth.
Rather -- again just from the description above -- you can hit it with a stream of water for minutes at a time, from all different angles, and it will be fine.
IOW, no problem with getting it wet. Yes problem with immersion.